Removed 02 sensors. Have engine light. Dealership mechanic yelled at me. Help. - Triumph Forum: Triumph Rat Motorcycle Forums
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post #1 of 34 (permalink) Old 09-20-2018, 08:25 PM Thread Starter
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Removed 02 sensors. Have engine light. Dealership mechanic yelled at me. Help.

I have a 2014 T100. It has the same snatchy low speed throttle situation that many have complained of.

With a friends help, he used his TuneECU program and turned off the O2 sensors by unchecking the box on the computer. (At least it ďappearedĒ as if we had done it correctly.) I drove home from his house and didnít notice any real difference in the bad snatchy issue. A little disappointed.

The next day I physically removed the sensors and the engine light came on. Crap.

1. Did the sensors not really get turned off?
2. Should I have noticed a huge improvement in the snatchy problem? Should it be night and day better?
3. Do I need to do something else?

I figured I would just give up and take it to the dealership and the head mechanic there lectured me that you should NEVER take off the O2 sensors on a EFI bike. He said it wonít run right. WHAT THE HECK? I thought I was reading on the forum here that I was SUPPOSED to take off the sensors to help my snatchy issues.

IíM SO CONFUSED!

My Stable: 2017 Porsche Macan GTS . 2014 Porsche Carrera S . 1996 Porsche Carrera 4S . 2017 Audi TTS . 2014 Triumph Bonneville T100 Black
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post #2 of 34 (permalink) Old 09-20-2018, 08:32 PM
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Well, did you load an open loop tune on the bike after you removed the sensors? Gotta tell the bike what you want it to do. It's used to running with feedback from the oxygen sensors to help it make decisions to adjust fueling. You can disable them, but now the ECU doesn't know what to do. It needs the proper instructions (tune) to deal with the changes you have imposed on it.

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post #3 of 34 (permalink) Old 09-20-2018, 09:04 PM Thread Starter
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Originally Posted by speedfoos View Post
Well, did you load an open loop tune on the bike after you removed the sensors? Gotta tell the bike what you want it to do. It's used to running with feedback from the oxygen sensors to help it make decisions to adjust fueling. You can disable them, but now the ECU doesn't know what to do. It needs the proper instructions (tune) to deal with the changes you have imposed on it.
No, I donít believe anything was done after the attempt to turn them off by un-checking the box. We thought that was all that was needed. Thatís all my buddy said he did on his Ď10 Bonnie.

What you say makes perfect sense. Thanks for making it so clear. So does his TuneECU program have a ďcannedĒ tune for just such a purpose? The SAI is off the bike (dummy solenoid in place) but there are no other modifications.

Thanks!

My Stable: 2017 Porsche Macan GTS . 2014 Porsche Carrera S . 1996 Porsche Carrera 4S . 2017 Audi TTS . 2014 Triumph Bonneville T100 Black
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post #4 of 34 (permalink) Old 09-20-2018, 09:16 PM
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A dumb question on my part, but did you reload the program back onto the bike with the box unchecked? Just uncheking the box without reloading the program accomplishes nada.
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post #5 of 34 (permalink) Old 09-20-2018, 09:32 PM Thread Starter
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A dumb question on my part, but did you reload the program back onto the bike with the box unchecked? Just uncheking the box without reloading the program accomplishes nada.
Smart question. My dumb answer is, I donít know. My buddy was in charge of the computer and I donít know how the process works. I will ask!

I wish there was a ďHow to tune your bikeĒ Step-by-step for us dummies. There is much info on this forum but so much knowledge of the process is assumed.

My Stable: 2017 Porsche Macan GTS . 2014 Porsche Carrera S . 1996 Porsche Carrera 4S . 2017 Audi TTS . 2014 Triumph Bonneville T100 Black
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post #6 of 34 (permalink) Old 09-20-2018, 10:19 PM
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TuneECU does not turn off O2 functions, it just disables the warning light if the cable is disconnected or some other problem with them occurs.
So even if friend performed correct procedure, I would not expect any change in bike if sensors were still connected.
Seems likely the disable process wasn't done right as the warning came on when you actually did unplug the sensors.
Dealer will always frown upon making changes from normal factory setup. You have a choice, go with dealer advice, let them do all the work and likely state the bike is running as designed, low rpm jerking and all
...or keep learning from these forums. PS there is a TuneECU for dummies thread on here someplace...lots of good details there.
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post #7 of 34 (permalink) Old 09-21-2018, 05:41 AM
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Quote:
Originally Posted by Harpeaux View Post
A dumb question on my part, but did you reload the program back onto the bike with the box unchecked? Just uncheking the box without reloading the program accomplishes nada.
Lol yes nada..
A friend and I did the exact thing you mention on his Bonnie. Unchecked the box and just saved it and disconnected.
We also went for a short ride and felt that it got smoother lol

Didn't know at the time that the unchecked O2 box map needs to be downloaded on to the ECU.. fun times.

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post #8 of 34 (permalink) Old 09-21-2018, 08:32 AM
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The TuneECU site has loads of custom maps and OEM maps. Pick one for no O2 and no SAI for the twin of your vintage (LCD, mech ODO, etc.)

Read and SAVE your old map, in case the new one fails.

Loading is super simple, plenty of step-by-step stuff on the site.
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post #9 of 34 (permalink) Old 09-21-2018, 10:51 AM Thread Starter
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The TuneECU site has loads of custom maps and OEM maps. Pick one for no O2 and no SAI for the twin of your vintage (LCD, mech ODO, etc.)

Read and SAVE your old map, in case the new one fails.

Loading is super simple, plenty of step-by-step stuff on the site.
I found the map 20731 (Bonnie, LCD odometer, stock peashooter silencers) which fits my bike profile. I donít see anywhere where it mentions no O2 and no SAI. The TuneECU website is not the most organized or easy to follow. So I donít know if I am searching for another tune or if this is the one I want in the end.

Iím still searching for a proper step-by-step regarding the process. In the meantime I am trying to piece together all the tips you guys are sharing. Thank you.

My Stable: 2017 Porsche Macan GTS . 2014 Porsche Carrera S . 1996 Porsche Carrera 4S . 2017 Audi TTS . 2014 Triumph Bonneville T100 Black
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post #10 of 34 (permalink) Old 09-21-2018, 02:07 PM
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Quote:
Originally Posted by BradB View Post
I found the map 20731 (Bonnie, LCD odometer, stock peashooter silencers) which fits my bike profile. I donít see anywhere where it mentions no O2 and no SAI. The TuneECU website is not the most organized or easy to follow. So I donít know if I am searching for another tune or if this is the one I want in the end.

Iím still searching for a proper step-by-step regarding the process. In the meantime I am trying to piece together all the tips you guys are sharing. Thank you.
It doesn't matter about the sai for a tune but think you will struggle to find a free tune that takes account of no 02 sensors, you could connect back up and try the free one to see the outcome other than that the only place I know that is relatively cost effective is triumph twin power who do tunes for various state of bike, it may well mean doing some other mods as well
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